Building Statistics
Project Title: Parkridge Center - Phase IV
Location: Reston, VA
Building Owner: Walker & Company
Occupancy: Commercial - Office Building
Size: 226,000 SF
Stories Above Grade: 7
Project Team:
Date of Construction: (Will update when information is available)
Cost Information: Approx. $50 million
Project Delivery Method: Design-Bid-Build
Architecture:
One of the main architectural features of the building is sloping columns on the south wall which extend from the base of the building to the roof. There is also a sky garden which is currently planned to have four larger planters containing trees in a central atrium area. Outside the central atrium of the sky garden there are planned to be several planters containing smaller trees and plants. The sky garden is covered by a series of pre-cast wings. On the north face of the building the building has three tiers forming an arcade.
Major Code Used:
- BOCA 1996
- IBC 2000
- 2000 IPC
Zoning: Fairfax County Zoning Ordinance, I-3
Building Envelope:
The building envelope is made up of a series of pre-cast concrete panels, brick, and glazing. The roof is comprised of metal deck with a 6.5” concrete slab topped with a built up membrane. The south face of the building is made up of exclusively of glazing panels that follow the slope of the columns.
Structural
The existing structural system of Parkridge Center - Phase VI is a composite steel system with braced frames to resist lateral loads. The foundation is a shallow foundation system which uses spread footings ranging in size from 17' x 17' to 19.5' x 19.5' , with depths ranging from 38" to 42". The typical infill beam in the exterior bays of the buidling is a W16x31 while in the interior bays it is a W16x26. The typical perimeter girder is either a W18 or a W21 member. The composite floor system is a 3 1/2" Light weight concrete slab on a 2"-20 gage steel deck. The typical camber placed on a bea in the system is 1 1/4". The sloping columns range in size from a W12x65 to a W12x152. The columns are spliced every three floors above the slab. The lateral system is made up of a series of braced frames. There are 2 frames in the N-S direction and 3 frames in the E-W direction. The typical Diagonal member in the frames ranges from an HSS 8x8x3/8 to an HSS 10x10x1/2.
Mechanical
The mechanical system used in Parkridge 6 is an variable air volume system. All the mechanical equipment is located at the roof level with the exception of the unit that services the ground level. The unit at the ground level only services the public areas of the ground floor. There are two main vertical ducts located near the east and west stairwells. The two vertical ducts feed into a set of 80x10 ducts which loop around their respective end of building.
Electrical
Parkridge 6 is serviced by a 3000A 480/277 3 phase 4w line to the distributoin center located on the ground level. The power is then transported to the upper floors through (2) 2000A plugin bus way which lead to (4) 400A breaker boxes on each floor. There is also a Diesel backup generator. The service line enters the building through (12) 4" PVC sc 40 conduit encased in concrete.
Lighting
The lobby area is the only area currently designed. All other areas of the building will be designed by their respective tenants. The lobby contains several 4" diameter downlights.
